Red Hat Bugzilla – Bug 143498
nc not compiled with -DTELNET
Last modified: 2007-11-30 17:10:57 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040614 Firefox/0.9 Description of problem: The man page for nc documents a -t option to allow communication with a telnet daemon. Currently, this option is not actually available because nc was not compiled with the necessary option. Version-Release number of selected component (if applicable): nc-1.10-22 How reproducible: Always Steps to Reproduce: 1. Run nc -h 2. Run nc -t localhost 23 3. Actual Results: Notice no -t option. # nc -h [v1.10] connect to somewhere: nc [-options] hostname port[s] [ports] ... listen for inbound: nc -l -p port [-options] [hostname] [port] options: -g gateway source-routing hop point[s], up to 8 -G num source-routing pointer: 4, 8, 12, ... -h this cruft -i secs delay interval for lines sent, ports scanned -l listen mode, for inbound connects -n numeric-only IP addresses, no DNS -o file hex dump of traffic -p port local port number -r randomize local and remote ports -s addr local source address -u UDP mode -v verbose [use twice to be more verbose] -w secs timeout for connects and final net reads -z zero-I/O mode [used for scanning] port numbers can be individual or ranges: lo-hi [inclusive] # nc -t localhost 23 nc -h for help Expected Results: One of the options should be for -t. Using the -t option should work Additional info:
Created attachment 108972 [details] Patch to nc.spec to build with -DTELNET This patch to the nc.spec file will build nc with the necessary option to support telnet negotiation.
The support is added to nc-1.10-24.